On-Farm Estimation of Economical and Ecological Optimum Nitrogen Rates for Rice Production: A Field Study of Transplanted Lowland Rice in Central Hills, Nepal

Thapa, Santanu; Amgain, Lal Prasad; Timsina, Jagadish; Shrestha, Abhishek

doi:10.13005/bbra/2846

Cited by 5 publications

(6 citation statements)

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“…After 70 days of sowing similar above-ground, dry matter accumulation was recorded in all other nutrient management practices except FAD. Thapa et al (2020) also recorded similar straw yields on NED, LCC -N + NE -P , K and NRD.…”

Section: Above-ground Dry Matter (Mt Ha -1 )supporting

confidence: 53%

“…B:C ratio was statistically similar in FAD, LCC-N+NE-P,K, and NED but was highest in LCC-N+NE-P,K (2.41) followed by FAD (2.38) and NED (2.29). Highest B:C in LCC-N+NE-P,K was also reported by Thapa et al (2020). Need based nitrogen application reduced the fertilizer cost without yield reduction revealing more profitability of the practice.…”

Section: Benefit-cost Ratiomentioning

confidence: 77%

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Assessment of Nutrient Expert Tool for Fertilizer Management in Rice at Fulbari, Chitwan, Nepal

Acharya¹,

Khanal²,

Marahatta³

et al. 2022

Agron J Nepal

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A field trial was conducted at Fulbari, Chitwan in 2017 to evaluate the growth, productivity and economics of rice production under different nutrient management practices. Trial was laid out in a split-plot design with five replications. The main plot factor consisted of two rice varieties (Radha-4; improved variety and Arize Tej Gold; a popular Hybrid) and subplot factor consisted of five different nutrient management practices farmers’ applied dose (FAD;0-20:0-15:0-18 NPK kg ha-1), government recommended dose (GRD; 100:30:30 NPK kg ha-1), NARC recommended dose (NRD; 120:60:40 NPK kg ha-1), LCC based N and NE® based P, K dose (LCC-N+NE-P,K; 90-115:5-22:17-50 NPK kg ha-1 for Radha-4 and 90-140:5-36:38-73 NPK kg ha-1 for Arize Tej Gold), Nutrient Expert® based NPK dose (NED; 93-109:5-22:17-50 NPK kg ha-1 for Radha-4 and 118-125:5-36:38-73 NPK kg ha-1 for Arize Tej Gold). Data regarding biometrical, phenological, and yield attributes were recorded at regular intervals. Results revealed that different nutrient management practices had a significant influence on growth, yield attributes, and yield of rice. Number of effective tillers per square meter (215.62), number of grains per panicle (132.52), panicle length (27.02 cm) was recorded higher in LCC-N+NE-P, K. Similarly, a number of grains per panicle and panicle length in LCC-N+NE-P, K were statistically similar to NED. Significantly higher grain yield (5.19 Mt ha-1) and straw yield (6.43 Mt ha-1) were recorded in LCC-N+NE-P, K compared to FAD but statistically similar to NED. Higher Benefit-cost (B:C) ratio (2.41) was obtained in LCC-N + NE – P, K which was statistically similar to FAD and NED. Thus, the combined use of LCC and Nutrient Expert software for nutrient management in rice was found productive and profitable in western Chitwan.

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Section: Above-ground Dry Matter (Mt Ha -1 )supporting

confidence: 53%

Section: Benefit-cost Ratiomentioning

confidence: 77%

Assessment of Nutrient Expert Tool for Fertilizer Management in Rice at Fulbari, Chitwan, Nepal

Acharya¹,

Khanal²,

Marahatta³

et al. 2022

Agron J Nepal

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“…Net revenue in NE was 143.20 % greater than FFP. Thapa et al (2020) also reported that the net revenue and crop production could be increased with NE recommendation by 12%. Site-specific nutrient management has been providing an adequate amount of nutrients to the plants resulting from the maximum attainable yield among different cereal crops, which has ultimately increased the benefit of production.…”

Section: Cost-benefit Analysismentioning

confidence: 95%

Assessment of Nutrient Expert ®-Hybrid maize model on productivity and profitability of winter maize in Terai region of eastern Nepal

Bogati

Kunwar

Amgain

2021

Heliyon

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Inadequate, unscientific, and lack of optimum utilization of fertilizer management devoid of site-specific nutrient management have been the significant constraints of maize (Zea mays L.) production in Nepal. Therefore, a multilocational farmers' field was planned and executed at two VDCs of Morang district in the Terai region of Nepal from December 2015 to May 2016. Nutrient Expert (NE) and Farmer's Fertilizer Practices (FFP) treatments were imposed in a randomized complete block design (RCBD) with twenty replications. The research explored highly significant results in terms of plant number m À2 , cob numbers m À2 , cob length, kernel rows cob À1 , kernels kernel row À1 , test weight, grain, stover, and biological yields and harvest index. NE showed the highest yield (8.06 tons ha -1 ) among the two treatments tested than FFP (4.52 tons ha À1 ). While comparing net revenue, NE-based fertilizer recommendation gave the significantly higher (NRs.151.116 thousand ha À1 equivalent to $1281 ha À1 ) result than FFP (NRs.84.834 thousand ha À1 equivalents to $707). The result suggests adopting NE practices to minimize the yield gaps and increase the productivity of maize in Morang and adjoining agro-climatic conditions of eastern Terai, Nepal.

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“…The grain yield showed the positive relation with the yield attributes like number of effective tillers m -2 , filled grains spike -1 . The poor status of total soil N has also marked the lesser yield under N omission plot as advocated by Thapa et al (2020) in rice at Bhaktapur, Nepal.…”

Section: Grain and Biological Yields And Harvest Indexmentioning

confidence: 99%

“…It is reported that the wheat growing area in Chitwan is 5,272 ha with an average productivity of 4.4 Mt ha -1 (MoALD, 2018), but in contrast to the national records, the wheat yield in inner-Terai, region including Chitwan, one of the potential wheat pocket domain is decreasing lower than potential yield, recording huge yield gaps over the farmer's field yield because of poor nutrient management in farmers' field at present (Amgain et al, 2020;MoALD, 2018). Nutrient imbalances, inefficient fertilizer use and large losses to the environment are blamed for the decreasing trend of yield especially over the use of nitrogen fertilizer as major and other macronutrients in minor (Amgain et al, 2020;Thapa et al, 2020). The proper management of nutrients is necessary for a successful crop production.…”

Section: Introductionmentioning

confidence: 99%

Growth, productivity, physical and economic optima and yield gaps estimation in wheat (Triticum aestivum L.) through site specific nutrient management approaches under inner-Terai region of Chitwan, Nepal

Marasini

Amgain

2021

J. Agric. Nat. Res.

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An on-farm field experiment was accomplished during the winter season of 2018/19 under inner Terai region at Khairahani, Chitwan for evaluating the influence of various site specific nutrient management approaches on growth, yield, optimum fertilizer dose and yield gaps of wheat (Triticum aestivum, L.). The experiment was laid out in Randomized Complete Block Design (RCBD) in three replications with different eight nutrient management practices: T1- farmers fertilization practice (FFP) (52:33:18 kg NPKha-1), T2 - Blanket recommendation (BR) (100:50:25 kg NPK ha-1), T3 - SSNM-NE (110:47:46 kg NPK ha-1),T4 - LCC-N+NE-P&K, T5 - NE-N + farmers -P&K, T6 - LCC- N + farmers–P&K, T7 - Nitrogen Omission Plot (NOPT) + NE- P&K, and T8 - NARC recommendation (120:60:40 kg NPK ha-1). The result findings indicated that the NARC recommendation was comparatively superior over other treatments in terms of plant height, dry matter accumulation, crop growth rate and yield, but the profitability (B:C ratio) was found higher in SSNM-Nutrient Expert recommendation. The physical and economic optimum level of fertilizer for wheat obtained was 135:47.66:43.94 kg NPK ha-1 and 130: 47.86:43.61 kg NPK ha-1, respectively. The yield gaps between farmers practice and SSNM-Nutrient Expert was found to be 110% and 41%, respectively over potential yield of wheat. Thus, it could be suggested that there is great potential to improve the yield of wheat through the NARC recommendation and the SSNM- Nutrient Expert model to raise sustained productivity and income of wheat farmers in inner-Terai region of Nepal.

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On-Farm Estimation of Economical and Ecological Optimum Nitrogen Rates for Rice Production: A Field Study of Transplanted Lowland Rice in Central Hills, Nepal

Cited by 5 publications

References 0 publications

Assessment of Nutrient Expert Tool for Fertilizer Management in Rice at Fulbari, Chitwan, Nepal

Assessment of Nutrient Expert Tool for Fertilizer Management in Rice at Fulbari, Chitwan, Nepal

Assessment of Nutrient Expert ®-Hybrid maize model on productivity and profitability of winter maize in Terai region of eastern Nepal

Growth, productivity, physical and economic optima and yield gaps estimation in wheat (Triticum aestivum L.) through site specific nutrient management approaches under inner-Terai region of Chitwan, Nepal

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